feat(content): function signatures + test cases

backend/data/questions/ambiguous-coordinates.yaml

@@ -9,6 +9,22 @@ categories:
 patterns:
   - backtracking
 
+function_signature: "def ambiguous_coordinates(s: str) -> list[str]:"
+
+test_cases:
+  visible:
+    - input: { s: "(123)" }
+      expected: ["(1, 2.3)", "(1, 23)", "(1.2, 3)", "(12, 3)"]
+    - input: { s: "(0123)" }
+      expected: ["(0, 1.23)", "(0, 12.3)", "(0, 123)", "(0.1, 2.3)", "(0.1, 23)", "(0.12, 3)"]
+  hidden:
+    - input: { s: "(00011)" }
+      expected: ["(0, 0.011)", "(0.001, 1)"]
+    - input: { s: "(100)" }
+      expected: ["(10, 0)", "(1, 0.0)"]
+    - input: { s: "(12)" }
+      expected: ["(1, 2)"]
+
 description: |
   We had some 2-dimensional coordinates, like `"(1, 3)"` or `"(2, 0.5)"`. Then, we removed all commas, decimal points, and spaces and ended up with the string `s`.